#!/usr/bin/env python
# -*- coding: UTF-8 -*-
###
#  Code start here
###

def add(a,b):
    "Add some data"
    return a + b

def sub(a,b):
    "Sub some data"
    return a - b

def sum(a,b):
    total = a + b
    print 'in sum(),total=',total
    return total

a = 1
b = 2
total = 30

sum(a,b)

print add(a,b)

print 'add=',add(a,b)

print 'sub=',sub(a,b)

print 'total=',total

